Since post WWII, SFRs have appreciated on average of about 4.3% per annum, which is slightly above long-term inflation. There have been periods of volatility over the last 100 years along, notably as seen in the recent financial crisis, but ultimately house values have usually recovered and continued on their steady slightly higher than average-inflation clip. Since most homes are financed, the application of financial leverage amplifies returns, which can lead to double digit returns.